Power-truck.



J; B. HBVBRLING.

POWER TERUGK I A PPLlOATION FILEDYPEB. 23, 1909.

Patented Nov. 30, 1909.

3 SHEETS-SHEET 1.V

' IN VENTO 72 S/OH/Y B. H5 V5 PLM/6 HL B. HBVERLING.

POWER TRUCK.

APPLICATION FILED PEB. za. 190s.

PatenteavNov. 3o, 1909.

3 SHEETS-SHEET 2.

' i INVENTOR JOH/Y WIM/55E B. #fram/NG' i BY .Tf B. HEVERLING.

v POWER TRUCK. APPLICATION ILBD FEB. 23, 1909.

Patented Nov. 30, v1909.

3 SHEETS-SHEET 3.

y /NVENTOE z 0/w3 H5 y: PL we A s eed as the peripheral speedlof the friction UNITED sTATEs PATENT oEEicE. y

To it 'may concern:

Idey it-known that I, JOHN'B. l-lEvERLiXG, a citizen-of the United States, residing at St.

Louis, Missouri, have invented a certain new and useful Improvement in Power-Trucks, of whichthe following is a full, clear, and

exactdescription, such as willenable others' skilled in the art to which it appertains to makej'and use the saine, reference being had to'tli accompanying drawings, forming part of this'specit'ication, in which- Figure Lis aside elevational View of niy improved power truck. Fig.l 2 is a top plan view. ofI thesame. Fig, A3 is an end elevational-view, partly in ,vertical section. Fig. Lluis .ai detailed View illustrating the method of'lubricating the traction wheels. y

This invention relates to a new and useful improvement in power trucks, the object being. to construct a truck in such; manner that the driving elementl is in frictional engagement with the drivin or traction wheels, means'being provide whereby said friction element may be moved into and out of `engagement, and coincidently there-v witli",4 operate the brake. used in connection "with said .friction element. The brake can he separately applied, if desired, but AIfliave shown 'the same operating in conjunction with thedevice which moves the friction elementi` into and out of engagement.

ByJny improved methodv of applying power'," itis'possible, when the friction eleinentis out. of'engagement with the drivingy wheel",`;to' "etup speed in the; motor, engine or otlfier4` riving medium'for Vthe friction elemeiitand then `to apply the friction element, ,running at such thigh speed, whereuponsaidj. friction felement will frictionally engagefthe traction wheels, moving them slowlyat first, until the momentum of moving the heavy, bodies supported by the truck is overcome, when the friction element gradually vtz'ikesa firmer .hold until nally the drivingielement attains the same peripheral e ement. y

Where an electric .motor is used as the power medium, theV inertia of the revolving armature is utilized to advantage, as I have found by experimentthat although the current be cut oi" there' is eiiouglistored-up energy' in the revolvingarinature to inovetlie truck a considerable distance.--gfAnotherQadjy vantage in a continuously running-motor as .a'driving medium resides inthe facttliat,

y .10i-IN n. HEvER'LINe, or sT. LOUIS, MISSOURI.

hieoWER-fraucx.

, Specification of Letters Patent. Patentd Nov. 30, 1909. yApplicaton' led February 23, .1909. 'Serial No. 479,481.

the highest amount of power of which the motor is capable of ydeveloping' is available at all times, and ni going up steep grades `this is an important factor, taken in connection with the friction'drive, because while the friction drive might give slightlyV in -nfieeting obstacles, the motor would continue to run, the constantly applied power of the traction wheels driving them up steep grades, until, of course, the angle at which gravity asserts itself in a backward pull, is reached.-l

In the drawings, lindicates the side frameset ni'y improved truck, which are l preferably in the forin'of plate'girders con sisting 'of two vertically disposed parallel plates, riveted or otherwise secured under a' compression member 2, 'preferably inthe torni `of an I-beam, the tension member be# yare located l,Within the side 'frames of the truck this cut-away portion may or may not be provided,"according to the-will of the designer.

4 indicates'A the end plates of the truckv frame, and indicates the Aspringfsupported transom carrying center bearing on which the car body is supported. :1n-'certain uses, this transom 5 may be omitted. 4:@ Aindicates a Hoor sheet supported by tension angles 3 on the inner sides of the plate girders, said floor sheet being removable by sliding it longitudinally out through one end of the truck. The openings in the plate girder sides may also be'closed by a plate'l, as shown in Fig. 1, in the upper end of which plate la is an opening in which the shaftof the friction element. operates. G indicates axles mounted in boxes 7 slidingly arranged in guide ways in the truck side frames, the tru-ck being supported on said avl'el boxes through springs 8.

9 are traction wheelsniounted to revolve von the axles 6, said traction wheels having ybrasses 10 arranged 1n their hub-portions.

for contactwith theaxles 6, the wheel and i itsbrasses being held in position by washer 11 andfa pin. A housingca rto the hub of thefwheel. i lhe hubof the f wheel surrounding the brasses l0 is prefer-` 13 is securedl ably made hollow so as to form an oil cham ber which may be filled through the oil cup 14, as shown in Fig. 4. In this way` the axles are constantly lubricated.

conform lto the traction wheels and their.

ianges, if said wheels are provided with fianges as shown in the drawings.

The motor frame 16 is supported in position by means of a piston rod 19,'whose plston operates in a cylinder 20. Pipes. 21 'lead to three-way 4valve whereby compressed air or other liuid pressure may be d1- rected to the chamber in cylinder 20, above or below the piston as the case may be, or exhausted from said space, according to the desire of the operator, to lift the frame 16 so that the friction wheels 18 are moved out of engagement with the traction wheels, or lower frame 16 so that its friction wheels 18 are moved into `engagement with the traction wheels, in which engaged position pressure may be applied above the .piston to in .crease the pressure of the frictional contact between the parts. 'Cylinder 20 is preferably mounted on one of the axles 6, asg

shown in Figs. 2 and 22 indicates brake shoes pivotally hung from the side frames of the truck so as to coperate with the traction wheels. Suspended from the ends of the armature Shaft 7 are rollers 23 which, when the friction` wheels 1S are in engagement with the traction wheels, are lowered so that the brake shoes 22 swing inwardly away from the treads'of the traction wheels. When, however, the friction wheels 18 are liftedout of engagement with the traction wheels, the rollers 23 are raised and all brakes are applied.

By controlling the pressure above and below the iston in the cylinder 20, bymeans of suita le valves, whose construction is well known, the `friction wheels 18 and the rollers 23 may be moved to an intermediate position Where neither friction nor braking power is applied to the traction wheels.

The rod by which the` rollers 23 are suspended from the. shaft 17 is preferably threaded with right and left threads and jam nuts provided so that by rotating said rods the piston on-the rollers 23 may be adjusted. Other means for adjusting the position lof the rollers 23 with respect to the armature shaft 17 can be applied, if desired.

I am aware that minor changes in the construction, arrangement and combination' of theseveral parts of my device can be made and substitutedl for those herein shown and described, without in the least departing from the nature and principle of my invention.-

Having thus described my invention, what I claim is: 1; In ai power truck, the combination with traction wheels, of a driving element d-esaid traction wheels, a pivotally supportedl frame on which said friction element is mounted, and means for moving said frame en its pivot whereby said frictional driving elementris thrown into, and out of engagement with said drivingwheels.

4. In a power truck, the combination with driving wheels, of a Ifriction element coperating therewith, a pivotally mounted frame on which said friction element is arranged, and fluid actuated means for moving said frame and its carried .friction element.

5. In a power truck, the combination with traction wheels, of a driving element eoperating therewith, a' pivotally mounted frame on which said driving element is arranged, fluid actuated means for moving said frame and-its driving element, brakes for said traction wheels and means carried by said frame for coperating with said brakes.

6. Ima power truck, the combination with traction wheels,of a driving element coperating directly with said wheels, a motor for operating said Adriving element, a pivotally mounted frame for supporting said motor, and means for raisinnr or lowering said frame so as to cause the driving element to engage with, or be disengaged from the traction wheels.

7. In a power truck, the combination with side framesand traction wheels, of power device carried by said truck, and a removable iloor platev slidingly arranged between the truek'side frames.

8. In a ower truck, the combination with plate gir er side frames having inwardly extending tension anges and a removable floor sheet slidingly arranged upon said tension ianges.

9. In a powertruck, the combination of traction wheels arranged in pairs at each side thereof, a'frictional driving element at each side of the truck cooperating with each pair of wheels, a movable frame in which vmo said driving 'elements are mounted, means for moving said frame toward and' from said traction Wheels, and brakes for coperatin with said traction ,Wheels when said driving elements are out of engagements* l0. ln a power truck, traction Wheels on each sidethereof, friotional driving elements for driving a pair of traotion'wheels at each side of the truck., a driving shaft upon which said friotional driving elements are mounted, a movable bearing for, said driving shaft, and a uid-actuated piston for controlling the position of said bearing, whereby the frictional 'driving elements may be moved into. and vout of cooperative relation to their'f-.traotion Wheels respectively.

1l. In a power truck, pairs of traction Wheels arranged at eachA side thereof, frictional driving elements cooperating therewith, a driving` shaft on which said elements are mounted, a pivoted frame carrying said shaft,means also mounted on said frame for driving said shaft, and means cooperating with the free end of said frame for qunkly moving thewc'lrivin'g elements into and out otk driving relation to said traction wheels.

In testimony whereof I hereunto niix my signature in the presence of two witnesses, this 18th day of Februar?, 1909.

JOHN B. HEVERLXG. YVit-nesses:4

F. R. CORNWALL, LENORE CLARK. 

